The cause of redness, swelling and burning sensation on the face may be allergy, but it may also be bacterial infection or sunburn. 1. Allergy: Facial allergies are commonly triggered by contact with face masks, cosmetics, skin care products, etc. In addition, food, drugs, the environment may also cause allergic phenomena, which leads to the symptoms of redness, swelling and burning sensation of the patient’s face. 2. Bacterial infection: such as type B hemolytic streptococcal infection caused by dengue, may lead to redness and swelling of the face and burning sensation. 3. Sunburn: acute phototoxic reaction that occurs in the sun-exposed skin after exposure to strong sunlight, which can also result in redness, swelling and burning sensation on the face. If the symptoms of redness, swelling and burning sensation of the face, you should seek medical treatment in a timely manner.